Bouchard tweeted a photo of herself with Parsons last week, describing him as her "most positive supporter".

The tennis star has previously spoken of their friendship, saying: "We talk about, you know, the mental aspect in tennis. He says how it's similar to him acting. He has to be in the moment on set and all these things. It's interesting to see how similar the mentality is."

Fans of The Big Bang Theory were certainly amused by Sheldon's appearance on Centre Court. Check out a few of the best responses below: